11 Replies Latest reply on Sep 22, 2008 12:57 PM by jacques couzteau

    JBoss slow after long uptime

    jacques couzteau Newbie

      Hi,
      I need help analysing a problem with my JBoss deployment.

      Generally the environment is stable. The problem has occurred 5 times since March and the web server handles about 250,000 - 500,000 requests per day.

      Problem:
      Sometimes the JVM suddenly gets incredibly slow. When that occurs I see that the CPU load never drops below 100% (1 CPU burning at top load). The memory consumption is higher than it should be according to the JVM setting (-Xmx2048m).

      I'm guessing that a garbage collector thread crashed.

      How can I analyse what is going wrong?

      config:
      * java version "1.6.0_04"
      * Java(TM) SE Runtime Environment (build 1.6.0_04-b12)
      * Java HotSpot(TM) 64-Bit Server VM (build 10.0-b19, mixed mode)

      * jboss-4.2.2.GA runs using 2GBRAM
      * Red Hat Enterprise Linux ES release 4 (Nahant Update 4)
      * hardware: 16GB Ram, 4 dual core CPUs

      * There is a mysql db running


      Thank you very much.

      jacques